Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus

Limin Zhu, Jinlong Liu, Weimin Zhang, Qi Sun, Haifa Hong, Zhou Du, Jinfen Liu*, Yi Qian, Qian Wang, Mitsuo Umezu

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)


    Long segment congenital tracheal stenosis (LSCTS) is one of most severe malformation with high mortality rate and dismal prospective. Hypoventilation is the main issue for the death of children with LSCTS after surgical correction. However, currently, little information is available on local aerodynamics to disclose the reasons for the improvement of such therapies, especially LSCTS with distal bronchus stenoses. Here, we investigated a patient-specific model of LSCTS with complete tracheal rings and bridging bronchus (BB). Computational fluid dynamics (CFD) was applied to analyze the local aerodynamics around BB before and after tracheal surgery in inspiratory phase and expiratory phase. Average pressure drop, wall shear stress, streamlines and energy loss were calculated to evaluate the surgical outcomes. The results indicate the airflow at the trachea and BB become more turbulent in expiration phase than that in inspiration phase. The turbulence increases the workloads of respiration in expiration phase. It should be the cause for postoperative hypoventilation. To study the local aerodynamics is helpful for the improvement of surgical therapies of the LSCTS.

    Original languageEnglish
    Title of host publication2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Print)9781479978625
    Publication statusPublished - 2015 Sept 8
    Event10th Asian Control Conference, ASCC 2015 - Kota Kinabalu, Malaysia
    Duration: 2015 May 312015 Jun 3


    Other10th Asian Control Conference, ASCC 2015
    CityKota Kinabalu


    • aerodynamics
    • airflow
    • bridging bronchus
    • computational fluid dynamics
    • congenital tracheal stenosis

    ASJC Scopus subject areas

    • Control and Systems Engineering


    Dive into the research topics of 'Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus'. Together they form a unique fingerprint.

    Cite this